JP3920240B2 - Loose tube type ribbon optical cable - Google Patents

Loose tube type ribbon optical cable Download PDF

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Publication number
JP3920240B2
JP3920240B2 JP2003110142A JP2003110142A JP3920240B2 JP 3920240 B2 JP3920240 B2 JP 3920240B2 JP 2003110142 A JP2003110142 A JP 2003110142A JP 2003110142 A JP2003110142 A JP 2003110142A JP 3920240 B2 JP3920240 B2 JP 3920240B2
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Japan
Prior art keywords
ribbon optical
optical cable
tube type
loose tube
loose
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Expired - Fee Related
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JP2003110142A
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Japanese (ja)
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JP2003322780A (en
Inventor
垠松 嚴
重鎮 黄
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Samsung Electronics Co Ltd
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Samsung Electronics Co Ltd
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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
    • G02B6/4401—Optical cables
    • G02B6/441—Optical cables built up from sub-bundles
    • G02B6/4411—Matrix structure
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
    • G02B6/4401—Optical cables
    • G02B6/4429—Means specially adapted for strengthening or protecting the cables
    • G02B6/44384—Means specially adapted for strengthening or protecting the cables the means comprising water blocking or hydrophobic materials
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
    • G02B6/4401—Optical cables
    • G02B6/4429—Means specially adapted for strengthening or protecting the cables
    • G02B6/4434—Central member to take up tensile loads

Description

【０００１】
【発明の属する技術分野】
本発明は、リボン光ケーブル(optical ribbon cable)に関し、特に、ルースチューブ(loose tube)を備えたリボン光ケーブルに関する。
【０００２】
【従来の技術】
通常、リボン光ケーブルは、 光信号の伝送媒体がリボン光ファイバであるものを意味し、そのリボン光ファイバは多心の光ファイバを一列に集合させたものを指す。リボン光ファイバは、多心の光ファイバを一列に集合させて紫外線硬化樹脂で被覆した後、その紫外線硬化樹脂を紫外線で硬化して製作される。また、リボン光ファイバを多数積層してマトリックス(matrix)構造のリボン光ファイバを構成することもできる。この種のリボン光ファイバは、多心の光ファイバを密集させるため、制限された空間内の光ファイバ密度が非常に高いという長所がある。高密度リボン光ケーブルが注目を浴びている理由は、既存の管路には既に多数の光ケーブルが布設されているため、その管路内に新規布設空間が不足しているためである。さらに、光ファイバパッキング密度(packing density)をより高め、既存の狭い管路に布設可能なように光ケーブルの外径を縮める作業が行われつつある。
【０００３】
図１は、従来のルースチューブ型リボン光ケーブルの構成を示す断面図である。リボン光ケーブルは、中心引張線(テンションメンバ)１１０、多数のリボン光ファイバ束１２０、多数のルースチューブ１３０、引張線（押さえ巻）１４０および外部被覆１５０を含めて構成される。
【０００４】
中心引張線１１０は、ルースチューブ型リボン光ケーブルに抗張力を提供し、その中心に位置する。
【０００５】
ルースチューブ１３０は、リボン光ファイバ束１２０を実装する。このリボン光ファイバ束１２０はそれぞれ一列に配列された４心以上の光ファイバを紫外線硬化樹脂で被覆処理した多数のリボン光ファイバを積層したマトリックス構造である。
【０００６】
引張線１４０は、多数のルースチューブ１３０を取り囲んでルースチューブ型リボン光ケーブルの抗張力を向上させる機能を行う。
【０００７】
外部被覆１５０は、その内部を外部環境から保護するためにリボン光ケーブルの最外郭に位置し、押出し工程によって成形される。
【０００８】
しかし、かかるルースチューブ型リボン光ケーブルは、外部被覆から内部への水分浸透に対する抵抗が弱く、また、外部ストレス(圧力、衝撃など)にも弱いといった問題がある。加えて、ルースチューブ型リボン光ケーブルの物理的な外観に関して、隣接する一対のルースチューブ１３０の外側面によって作られるくぼみ１６０が存在するため、リボン光ケーブルの断面形態をその原型のまま保持するのが困難であるといった問題がある。
【０００９】
【発明が解決しようとする課題】
本発明は、前述した従来の問題点を解決するためには案出されたものであり、耐水特性および圧縮特性を向上することができ、外観を改善したルースチューブ型リボン光ケーブルを提供することにその目的がある。
【００１０】
【課題を解決するための手段】
このような目的を達成する本発明のルースチューブ型リボン光ケーブルは、リボン光ケーブルの中心に位置する中心引張線と；それぞれ一列に配列された多心の光ファイバと多心の光ファイバを取り囲む被覆とを備えたリボン光ファイバを多数積層して形成されたリボン光ファイバ束を実装し、中心引張線を取り囲む多数のルースチューブと；多数のルースチューブの間に配置された多数の円形吸水部材と；多数のルースチューブおよび多数の円形吸水部材を取り囲む吸水テープと；内部を外部環境から保護するためにリボン光ケーブルの最外郭に位置する外部被覆と；を含み、円形吸水部材は、吸水テープと多数のルースチューブとの間に存在する水分を吸収するとともに、ルースチューブ型リボン光ケーブルの断面形態を円形に保持することができるように、水分を吸収する特性を有する多数の吸水性ヤーン（ｗａｔｅｒ ａｂｓｏｒｂｉｎｇ ｙａｒｎ）と、吸水性ヤーンよりも高い強度を有する多数の強性ヤーン（ｓｔｒｅｎｇｔｈ ｙａｒｎ）とを該円形吸水部材が形態を保持できるように撚って構成したことを特徴とする。
【００１１】
円形吸収部材は、その中心に一つの強性ヤーンが位置し、前記強性ヤーンの周囲に複数の強性ヤーンと複数の吸水性ヤーンとが撚られた構成を有するようにすることができる。
【００１２】
また、ルースチューブ型リボン光ケーブルは、抗張力を強化するために吸水テープと外部被覆との間に配置される引張線をさらに含むと好ましい。
【００１３】
中心引張線はガラス繊維強化プラスチック(ＦＲＰ:fiberglass reinforced plastic)材質から形成されるとよい。
【００１４】
さらに、ルースチューブ型リボン光ケーブルは、ポリ塩化ビニル(ＰＶＣ:polyvinyl chloride)またはポリエチレン(ＰＥ:polyethylene)材質から形成され、中心引張線をコーティングするコーティング層をさらに含むとなおよい。
【００１５】
外部被覆は、ポリ塩化ビニル(ＰＶＣ:polyvinyl chloride)、ポリエチレン(ＰＥ:polyethylene)、ハイトレル(hytrel)、ナイロン(nylon)およびポリプロピレン(polypropylene)のうちいずれか一つの材質から形成されるとなお好ましい。
【００１６】
また、外部被覆は押出し工程によって成形されるようにするとよい。
【００１７】
【発明の実施の形態】
以下、本発明の一実施例を添付図面を参照しつつ詳細に説明する。図面中、同一の構成要素には同一符号を共通使用する。なお、周知技術については適宜説明を省略するものとする。
【００１８】
図２は、本発明の好ましい一実施例によるルースチューブ型リボン光ケーブルの構成を示す断面図であり、図３は、図２に示したルースチューブの断面図であり、図４は、図２に示した円形吸水部材の断面図である。
【００１９】
図２に示すように、リボン光ケーブルは、中心引張線２１０、多数のルースチューブ２６０、多数の円形吸水部材３００、第２吸水テープ２７０、引張線２８０および外部被覆２９０を含んで構成される。
【００２０】
中心引張線２１０は、ルースチューブ型リボン光ケーブルに抗張力を提供し、その中心に位置する。中心引張線２１０の材質にはガラス繊維強化プラスチック(ＦＲＰ:fiberglass reinforced plastic)を利用できる。中心引張線２１０上をコーティングしたコーティング層２２０の材質にはポリ塩化ビニル(ＰＶＣ:polyvinyl chloride)、ポリエチレン(ＰＥ:polyethylene)などの高分子化合物を利用できる。また、コーティングされた中心引張線２１０、２２０には第１吸水テープ２３０が巻かれている。この第１吸水テープ２３０は中心引張線２１０と多数のルースチューブ２６０との間に存在する水分を吸収する機能を行う。
【００２１】
ルースチューブ２６０はリボン光ファイバ束２４０を実装している。このリボン光ファイバ束２４０は、それぞれ一列に配列された４心以上の光ファイバ２４２を紫外線硬化樹脂で被覆処理した多数のリボン光ファイバ２４４を積層したマトリックス構造である。また、ルースチューブ２６０の中空部分にはリボン光ファイバ束２４０を外部衝撃から保護し、ルースチューブ２６０内に浸透した水分を吸収するように機能をするゼリーコンパウンド(jelly compound)２５０が充填される。さらに、多数のルースチューブ２６０は中心引張線２１０を中心に螺旋状またはＳ−Ｚパターンで撚られている。
【００２２】
円形吸水部材３００は、隣接する一対のルースチューブ２６０の外側面によって作られるくぼみに配設され、耐水性を有する。これは、第２吸水テープ２７０と多数のルースチューブ２６０との間に存在する水分を吸収するためである。また、円形吸水部材３００は所定強度を有するため、リボン光ケーブルの圧縮特性を向上させるとともに、多数のルースチューブ２６０によって作られるくぼみを埋め、リボン光ケーブルの断面が円形を保持できるようにする。さらに、円形吸水部材３００は全体的に円形をなすように多数の吸水性ヤーン(water absorbing yarn)と強性ヤーン(strength yarn)を互いに撚って構成されてる。
【００２３】
図４に示すように、円形吸水部材３００はそれぞれ、水分を吸収して膨張する特性を有した３心の吸水性ヤーン３１０と、その円形吸水部材３００が形態を保持できるようにそれぞれ所定強度を有する４心の強性ヤーン３２０とから構成されている。３心の吸水性ヤーン３１０と４心の強性ヤーン３２０は互いにその円形吸水部材３００が全体的に円形をなすように撚られている。強性ヤーン３２０にはアラミッドヤーン(aramid yarn)またはガラスヤーン(glass yarn)を利用できる。
【００２４】
図２を再び参照すれば、第２吸水テープ２７０は多数のルースチューブ２６０および多数の円形吸水部材３００を取り囲んでその内部に水分が浸透するのを防止する。引張線２８０は第２吸水テープ２７０を取り囲んでリボン光ケーブルの抗張力を向上させる機能を行う。また、その材質にはアラミッドヤーンまたはガラスヤーンを利用できる。外部被覆２９０は、ルースチューブ型リボン光ケーブルの最外郭に位置する。外部被覆２９０の材質にはＰＶＣ(polyvinyl chloride)、ＰＥ(polyethylene)、ハイトレル(hytrel)、ナイロン(nylon)、ポリプロピレン(polypropylene)のような高分子化合物を利用でき、押出し工程によって成形される。また、外部被覆２９０を除去する便宜のためにその内壁に隣接してリップコード(rip cord)(図示せず)を実装することもできる。
【００２５】
【発明の効果】
上述のように、本発明によるルースチューブ型リボン光ケーブルは、円形吸水部材を利用するため、リボン光ケーブルの耐水特性および圧縮特性を向上させ、その外観を改善することができる。
【００２６】
以上では本発明を具体的な一実施例に基づいて説明してきたが、本発明の技術的思想を外れない範囲内でさまざまな変形や修正が可能なことは勿論である。
【図面の簡単な説明】
【図１】従来のルースチューブ型リボン光ケーブルの構成を示す断面図。
【図２】本発明の好ましい一実施例によるルースチューブ型リボン光ケーブルの構成を示す断面図。
【図３】図２に示したルースチューブの断面図。
【図４】図２に示した円形吸水部材の断面図。
【符号の説明】
２１０ 中心引張線
２２０ コーティング層
２３０ 第１吸水テープ
２４０ リボン光ファイバ束
２４２ 光ファイバ
２４４ リボン光ファイバ
２５０ ゼリーコンパウンド
２６０ ルースチューブ
２７０ 第２吸水テープ
２８０ 引張線
２９０ 外部被覆
３００ 円形吸水部材
３１０ 吸水性ヤーン
３２０ 強性ヤーン[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an optical ribbon cable, and more particularly, to a ribbon optical cable having a loose tube.
[0002]
[Prior art]
Usually, the ribbon optical cable means that the optical signal transmission medium is a ribbon optical fiber, and the ribbon optical fiber is an assembly of multi-core optical fibers in a line. The ribbon optical fiber is manufactured by gathering multi-core optical fibers in a line and coating with an ultraviolet curable resin, and then curing the ultraviolet curable resin with ultraviolet rays. Further, a ribbon optical fiber having a matrix structure can be configured by laminating a large number of ribbon optical fibers. This type of ribbon optical fiber has an advantage that the density of the optical fiber in a limited space is very high because a multi-core optical fiber is densely packed. The reason why high-density ribbon optical cables are attracting attention is that a large number of optical cables have already been installed in existing pipelines, and new installation spaces are insufficient in the pipelines. In addition, work is being carried out to increase the optical fiber packing density and reduce the outer diameter of the optical cable so that it can be installed in an existing narrow conduit.
[0003]
FIG. 1 is a cross-sectional view showing a configuration of a conventional loose tube type ribbon optical cable. The ribbon optical cable includes a central tensile wire (tension member) 110, a large number of ribbon optical fiber bundles 120, a large number of loose tubes 130, a tensile wire (cushion winding) 140, and an outer sheath 150.
[0004]
The center pull line 110 provides tensile strength to the loose tube ribbon optical cable and is located at the center thereof.
[0005]
The loose tube 130 mounts the ribbon optical fiber bundle 120. The ribbon optical fiber bundle 120 has a matrix structure in which a large number of ribbon optical fibers obtained by coating four or more optical fibers arranged in a row with an ultraviolet curable resin are laminated.
[0006]
The tension wire 140 surrounds a number of loose tubes 130 and performs the function of improving the tensile strength of the loose tube type ribbon optical cable.
[0007]
The outer coating 150 is positioned at the outermost portion of the ribbon optical cable to protect the inside from the external environment, and is formed by an extrusion process.
[0008]
However, such a loose tube type ribbon optical cable has a problem that resistance to moisture permeation from the outer coating to the inside is weak and resistance to external stress (pressure, impact, etc.). In addition, regarding the physical appearance of the loose tube type ribbon optical cable, there is a recess 160 formed by the outer surface of a pair of adjacent loose tube 130, so that it is difficult to keep the cross-sectional shape of the ribbon optical cable in its original form. There is a problem such as.
[0009]
[Problems to be solved by the invention]
The present invention has been devised to solve the above-described conventional problems, and provides a loose tube type ribbon optical cable which can improve water resistance and compression characteristics and has an improved appearance. There is that purpose.
[0010]
[Means for Solving the Problems]
The loose tube type ribbon optical cable of the present invention that achieves such an object includes a central tension line located at the center of the ribbon optical cable; a multi-core optical fiber arranged in a row and a coating surrounding the multi-fiber optical fiber; A plurality of loose tubes that are formed by stacking a plurality of ribbon optical fibers each having a plurality of ribbon optical fibers, and that surround a central tensile line; and a large number of circular water-absorbing members disposed between the numerous loose tubes; numerous and loose tubes and a number of water-absorbing tape surrounding the circular water-absorbing member; outer coating and located outermost ribbon optical cable in order to protect interior from the external environment; look including a circular water-absorbing member has water absorption tape and number Absorbs moisture present between the loose tube and the circular cross section of the loose tube type ribbon optical cable. The circular water absorbing member includes a plurality of water absorbing yarns having a property of absorbing moisture and a number of strong yarns having higher strength than the water absorbing yarns. It is characterized by being twisted so that the form can be maintained .
[0011]
The circular absorbent member may have a configuration in which one strong yarn is located at the center and a plurality of strong yarns and a plurality of water absorbent yarns are twisted around the strong yarn.
[0012]
Moreover, it is preferable that the loose tube type ribbon optical cable further includes a tensile wire disposed between the water-absorbing tape and the outer covering in order to strengthen the tensile strength.
[0013]
The center tensile wire may be formed of a fiberglass reinforced plastic (FRP) material.
[0014]
Further, the loose tube type ribbon optical cable may further include a coating layer formed of a polyvinyl chloride (PVC) material or a polyethylene (PE) material and coating a central tensile wire.
[0015]
More preferably, the outer coating is formed of any one of polyvinyl chloride (PVC), polyethylene (PE), hytrel, nylon, and polypropylene.
[0016]
The outer coating may be formed by an extrusion process.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings. In the drawings, the same reference numerals are commonly used for the same components. Note that the description of the known technology will be omitted as appropriate.
[0018]
2 is a cross-sectional view showing a configuration of a loose tube type ribbon optical cable according to a preferred embodiment of the present invention, FIG. 3 is a cross-sectional view of the loose tube shown in FIG. 2, and FIG. It is sectional drawing of the shown circular water absorbing member.
[0019]
As shown in FIG. 2, the ribbon optical cable includes a center tensile wire 210, a number of loose tubes 260, a number of circular water absorbing members 300, a second water absorbing tape 270, a tension wire 280, and an outer covering 290.
[0020]
The center pull line 210 provides tensile strength to the loose tube ribbon optical cable and is located at the center thereof. A glass fiber reinforced plastic (FRP) can be used as the material of the center tensile wire 210. A polymer compound such as polyvinyl chloride (PVC) or polyethylene (PE) can be used as the material of the coating layer 220 coated on the central tensile wire 210. Further, a first water absorbing tape 230 is wound around the coated center tensile wires 210 and 220. The first water-absorbing tape 230 functions to absorb moisture existing between the central tensile wire 210 and the numerous loose tubes 260.
[0021]
The loose tube 260 mounts the ribbon optical fiber bundle 240. The ribbon optical fiber bundle 240 has a matrix structure in which a large number of ribbon optical fibers 244 obtained by coating four or more optical fibers 242 arranged in a row with an ultraviolet curable resin are laminated. The hollow portion of the loose tube 260 is filled with a jelly compound 250 that protects the ribbon optical fiber bundle 240 from external impact and absorbs moisture that has penetrated into the loose tube 260. Further, a number of loose tubes 260 are twisted in a spiral or SZ pattern around the center tensile line 210.
[0022]
The circular water absorbing member 300 is disposed in a recess formed by the outer surfaces of a pair of adjacent loose tubes 260 and has water resistance. This is to absorb moisture existing between the second water absorbing tape 270 and the many loose tubes 260. In addition, since the circular water absorbing member 300 has a predetermined strength, it improves the compression characteristics of the ribbon optical cable and fills the recesses formed by the numerous loose tubes 260 so that the cross section of the ribbon optical cable can be kept circular. Further, the circular water absorbing member 300 is formed by twisting a plurality of water absorbing yarns and strength yarns so as to form a circular shape as a whole.
[0023]
As shown in FIG. 4, each of the circular water absorbing members 300 has a predetermined strength so that the three water absorbing yarns 310 having a characteristic of absorbing and expanding moisture and the circular water absorbing member 300 can maintain the form. It is composed of four-strength strong yarn 320 having the same. The three water absorbent yarns 310 and the four core strong yarns 320 are twisted so that the circular water absorbing member 300 forms a circular shape as a whole. The strong yarn 320 can be an aramid yarn or a glass yarn.
[0024]
Referring to FIG. 2 again, the second water absorbing tape 270 surrounds the plurality of loose tubes 260 and the plurality of circular water absorbing members 300 to prevent moisture from penetrating therein. The tensile wire 280 surrounds the second water absorbing tape 270 and performs a function of improving the tensile strength of the ribbon optical cable. The material can be aramid yarn or glass yarn. The outer covering 290 is located at the outermost shell of the loose tube type ribbon optical cable. The material of the outer coating 290 can be a polymer compound such as PVC (polyvinyl chloride), PE (polyethylene), hytrel, nylon, polypropylene, and is formed by an extrusion process. Also, a rip cord (not shown) can be mounted adjacent to the inner wall for the convenience of removing the outer covering 290.
[0025]
【The invention's effect】
As described above, since the loose tube type ribbon optical cable according to the present invention uses a circular water absorbing member, it is possible to improve the water resistance and compression characteristics of the ribbon optical cable and to improve its appearance.
[0026]
Although the present invention has been described based on one specific embodiment, it goes without saying that various modifications and corrections can be made without departing from the technical idea of the present invention.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing a configuration of a conventional loose tube type ribbon optical cable.
FIG. 2 is a sectional view showing the structure of a loose tube type ribbon optical cable according to a preferred embodiment of the present invention.
3 is a cross-sectional view of the loose tube shown in FIG.
4 is a cross-sectional view of the circular water absorbing member shown in FIG.
[Explanation of symbols]
210 Central tensile wire 220 Coating layer 230 First water absorbing tape 240 Ribbon optical fiber bundle 242 Optical fiber 244 Ribbon optical fiber 250 Jelly compound 260 Loose tube 270 Second water absorbing tape 280 Tensile wire 290 Outer coating 300 Circular water absorbing member 310 Water absorbing yarn 320 Strong yarn

Claims (7)

ルースチューブ型リボン光ケーブルにおいて、
リボン光ケーブルの中心に位置する中心引張線と；
それぞれ一列に配列された多心の光ファイバと該多心の光ファイバを取り囲む被覆とを備えたリボン光ファイバを多数積層して形成されたリボン光ファイバ束を実装し、前記中心引張線を取り囲む多数のルースチューブと；
前記多数のルースチューブの間に配置された多数の円形吸水部材と；
前記多数のルースチューブおよび多数の円形吸水部材を取り囲む吸水テープと；
内部を外部環境から保護するために前記リボン光ケーブルの最外郭に位置する外部被覆と；を含み、
前記円形吸水部材は、前記吸水テープと前記多数のルースチューブとの間に存在する水分を吸収するとともに、ルースチューブ型リボン光ケーブルの断面形態を円形に保持することができるように、水分を吸収する特性を有する多数の吸水性ヤーン（ｗａｔｅｒ ａｂｓｏｒｂｉｎｇ ｙａｒｎ）と、前記吸水性ヤーンよりも高い強度を有する多数の強性ヤーン（ｓｔｒｅｎｇｔｈ ｙａｒｎ）とを該円形吸水部材が形態を保持できるように撚って構成したことを特徴とするルースチューブ型リボン光ケーブル。In loose tube type ribbon optical cable,
A central tension line located in the center of the ribbon optical cable;
A ribbon optical fiber bundle formed by laminating a number of ribbon optical fibers each having a multi-core optical fiber arranged in a row and a coating surrounding the multi-core optical fiber is mounted, and surrounds the central tensile line With many loose tubes;
A number of circular water absorbing members disposed between the number of loose tubes;
A water absorbent tape surrounding the plurality of loose tubes and the plurality of circular water absorbent members;
Look including the; outer coating and located outermost of the ribbon optical cable in order to protect the inside from the external environment
The circular water-absorbing member absorbs moisture so as to absorb moisture existing between the water-absorbing tape and the plurality of loose tubes, and to maintain a circular cross-sectional shape of the loose-tube type ribbon optical cable. A plurality of water absorbing yarns having characteristics and a number of strong yarns having higher strength than the water absorbing yarns are twisted so that the circular water absorbing member can maintain its form. loose tube ribbon optical cable, characterized in that configuration was. 抗張力を強化するために前記吸水テープと外部被覆との間に配置される引張線をさらに含む請求項１記載のルースチューブ型リボン光ケーブル。  The loose tube type ribbon optical cable according to claim 1, further comprising a tension wire disposed between the water-absorbing tape and an outer covering to enhance tensile strength. 前記中心引張線はガラス繊維強化プラスチック材質から形成される請求項１記載のルースチューブ型リボン光ケーブル。  The loose tube type ribbon optical cable according to claim 1, wherein the center tensile wire is formed of a glass fiber reinforced plastic material. ポリ塩化ビニルまたはポリエチレン材質から形成され、前記中心引張線をコーティングするコーティング層をさらに含む請求項１記載のルースチューブ型リボン光ケーブル。  The loose tube type ribbon optical cable according to claim 1, further comprising a coating layer formed of a polyvinyl chloride or polyethylene material and coating the central tensile wire. 前記外部被覆は、ポリ塩化ビニル、ポリエチレン、ハイトレル、ナイロンおよびポリプロピレンのうちいずれか一つの材質から形成される請求項１記載のルースチューブ型リボン光ケーブル。  2. The loose tube type ribbon optical cable according to claim 1, wherein the outer coating is made of any one material of polyvinyl chloride, polyethylene, hytrel, nylon and polypropylene. 前記外部被覆は押出し工程によって成形される請求項１記載のルースチューブ型リボン光ケーブル。  The loose tube type ribbon optical cable according to claim 1, wherein the outer coating is formed by an extrusion process. 前記円形吸収部材は、その中心に一つの強性ヤーンが位置し、前記強性ヤーンの周囲に複数の強性ヤーンと複数の吸水性ヤーンとが撚られた構成を有することを特徴とする請求項１に記載のルースチューブ型リボン光ケーブル。The circular absorbent member has a configuration in which one strong yarn is located at the center thereof, and a plurality of strong yarns and a plurality of water-absorbing yarns are twisted around the strong yarn. Item 11. A loose tube type ribbon optical cable according to item 1.
JP2003110142A 2002-04-30 2003-04-15 Loose tube type ribbon optical cable Expired - Fee Related JP3920240B2 (en)

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KR100442687B1 (en) 2004-08-02
CN1212532C (en) 2005-07-27

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